The 5.3 Blazer build

[Damien]

Nice work so far.
What are you using for a water pump? I thought the water pump on the truck engines had clearance problems with the LS1 intake.

[Butcherboy]

Originally Posted by Damien

Nice work so far.
What are you using for a water pump? I thought the water pump on the truck engines had clearance problems with the LS1 intake.

I ran into to problem. I found out that the 2007 or newer Silverado water pumps will clear the throttle body. I also had to mod the idler pulley location to below the alt. The old idler mount had to cut off the truck drive unit bracket.

Here is a picture of the idler relocation mod. Also a longer belt was needed. I think something around 102 inches. Took me 3 attempts to get the right belt!





Justin Hope this answers your questions! I also had to add washers behind the pulley and use all thread bolt and locker nut!